Most acidic is :
D.
Phenol is acidic in nature and the acidic nature of phenol is increased by the presence of - I (electron attracting) groups at o - and / or p - position of the - OH group .However benzoic acid is more acidic than nitro - phenol .
Compound reacting with alkaline KMnO4 :
(CH3)3-C-OH
(CH3)2-CH-OH
(CH3)3-C-CH2OH
none of the above
Lucas reagent reacts fastest with :
butanol - 1
butanol - 2
2 - methyl - propanol - 2
2 - methyl - propanol - 1
lsopropyl benzene on air oxidation in the presence of dilute acid gives
C6H5COOH
C6H5COCH3
C6H5CHO
C6H5OH.